/* Header */
.site-header {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    padding: 1.5rem 3rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 100;
}

.logo-area {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.2rem;
    color: var(--primary);
}

.logo-icon {
    font-size: 1.8rem;
    background: #2C3E50;
    color: white;
    padding: 6px;
    border-radius: 6px;
}

.home-notification {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 0.9rem;
    letter-spacing: 0.05em;
    color: var(--primary);
    position: absolute;
    top: 1.5rem;
    right: 3rem;
}

.header-info {
    font-weight: 700;
    font-size: 0.9rem;
    letter-spacing: 0.05em;
    color: var(--primary);
}

/* Screen Layouts */
#app {
    width: 100%;
    height: 100%;
    position: relative;
}

.screen {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    padding-top: 80px;
    display: flex;
    flex-direction: column;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.4s ease;
    overflow: hidden;
}

.screen.active {
    opacity: 1;
    pointer-events: all;
    z-index: 10;
}

.hidden {
    display: none !important;
}

/* --- Home Screen Layout --- */
.home-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 100%;
}

.home-hero-section {
    min-height: 100vh;
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 3rem;
    padding: 0 1rem;
    box-sizing: border-box;
}

#screen-home {
    overflow-y: auto;
    overflow-x: hidden;
    height: 100vh;
    scrollbar-width: thin;
    scrollbar-color: #CBD5E0 transparent;
}

/* --- Rules Layout --- */
.rules-section {
    width: 100%;
    max-width: 1200px;
    margin-top: 3rem;
    padding-bottom: 5rem;
    display: flex;
    flex-direction: column;
    gap: 2rem;
    padding-left: 2rem;
    padding-right: 2rem;
}

.rules-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
    width: 100%;
    margin: 0 auto;
}

/* --- Modal Layout Base --- */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: 1000;
    display: flex;
    justify-content: center;
    align-items: center;
}

.modal.hidden {
    display: none;
}

.modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(4px);
}